Waveguides
US10042096B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2014 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | May 19, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for manufacturing a waveguide for a display apparatus comprising providing a planar optical waveguide part (20), depositing upon the optical waveguide part a fluid material (11) curable to form an optically transparent solid, impressing (30) upon the fluid material an impression defining an input diffraction grating region, an intermediate diffraction grating region and an output diffraction grating region wherein the fluid material of the intermediate diffraction grating region is continuous with the fluid material of at least the input diffraction grating region, curing (45) the impressed fluid material to solidify said impression. The physical location of the input diffraction grating is located wholly within the geographical area of the intermediate grating, and the grating vectors of the input diffraction grating and the intermediate diffraction grating are oriented in different respective directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.